/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.bytedance.bitsail.common.util;

import org.apache.commons.lang3.StringUtils;

import static org.apache.commons.lang3.StringUtils.isEmpty;

public class StrUtil {

  public static String mask(String input) {
    if (isEmpty(input)) {
      return StringUtils.EMPTY;
    }
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < input.length(); i++) {
      sb.append("*");
    }

    return sb.toString();
  }

}
